1 //===----------------------------------------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 // UNSUPPORTED: c++03, c++11, c++14, c++17
9
10 // <set>
11
12 // template <class T, class Compare, class Allocator, class Predicate>
13 // typename set<T, Compare, Allocator>::size_type
14 // erase_if(set<T, Compare, Allocator>& c, Predicate pred);
15
16 #include <set>
17
18 #include "test_macros.h"
19 #include "test_allocator.h"
20 #include "min_allocator.h"
21
22 template <class S, class Pred>
test0(S s,Pred p,S expected,std::size_t expected_erased_count)23 void test0(S s, Pred p, S expected, std::size_t expected_erased_count) {
24 ASSERT_SAME_TYPE(typename S::size_type, decltype(std::erase_if(s, p)));
25 assert(expected_erased_count == std::erase_if(s, p));
26 assert(s == expected);
27 }
28
29 template <typename S>
test()30 void test()
31 {
32 auto is1 = [](auto v) { return v == 1;};
33 auto is2 = [](auto v) { return v == 2;};
34 auto is3 = [](auto v) { return v == 3;};
35 auto is4 = [](auto v) { return v == 4;};
36 auto True = [](auto) { return true; };
37 auto False = [](auto) { return false; };
38
39 test0(S(), is1, S(), 0);
40
41 test0(S({1}), is1, S(), 1);
42 test0(S({1}), is2, S({1}), 0);
43
44 test0(S({1, 2}), is1, S({2}), 1);
45 test0(S({1, 2}), is2, S({1}), 1);
46 test0(S({1, 2}), is3, S({1, 2}), 0);
47
48 test0(S({1, 2, 3}), is1, S({2, 3}), 1);
49 test0(S({1, 2, 3}), is2, S({1, 3}), 1);
50 test0(S({1, 2, 3}), is3, S({1, 2}), 1);
51 test0(S({1, 2, 3}), is4, S({1, 2, 3}), 0);
52
53 test0(S({1, 2, 3}), True, S(), 3);
54 test0(S({1, 2, 3}), False, S({1, 2, 3}), 0);
55 }
56
main(int,char **)57 int main(int, char**)
58 {
59 test<std::set<int>>();
60 test<std::set<int, std::less<int>, min_allocator<int>>> ();
61 test<std::set<int, std::less<int>, test_allocator<int>>> ();
62
63 test<std::set<long>>();
64 test<std::set<double>>();
65
66 return 0;
67 }
68